Punching-machine



C. M. CALDWELL.

PUNCHING MACHINE.- APPLICATION FIL'EDVOCT. 10, 1919.

1,3 9,3 Pafented Feb. 22, 1921. I

CHARLES M. CALDWELL, or

CHAMPAIGN, ILLINOIS, ASSIGNOR' TO K. W. CALDWELL,

OF CHAMPAIGN, ILLINOIS. 7

" rU oHIne MAcmNn. 7

Application filed October 10, 1919 Serial No. 329,668.

To all 10 7mm it may concern Be it knownthat I, CHARLES M. CALD- ing at Champaign, in the county of Champaign and State of Illinois, have lnvented certain new and useful Improvements in Punching-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference be ing had to the accompanying drawlngs, forming part ofthis specification.

This invention relates to punching machines and has for its object the provision "of a machine for forming ears or lateral projections on connecter pins or nails commonly used for securing sectional insulators in place, these ears beingformed on the pin after the same has been placed through the sections of the insulator and at such a distance from the head of the pin as to permit a slight movement of the sections toward and away from one another.

In the accompanying drawings:

Figure 1 is a side elevation of the machine constituting the present invention;

Fig. 2 is a similar view showlng the parts in operated position;

Fig. 3 is a detail View of thedies; and

Fig. 4 illustratesan insulator nail extending through the insulator and provlded w th ears or projections for retainmg 1t there n.

As shown in Fig. 1, the machine embodies a frame formed of a base 1 and an upper portion 2 which is made integral wlth the base and overhangs the same. Seated 1n the base 1, and projecting upwardly therefrom a short distance is a die 3 and extending downwardly through a passage 4 in the overhanging portion 2 of the frame is a second die 5, positioned in vertical alinement with die 3. Normally .the two dies are held with their adjacent ends spaced a short distance apart, the lower die 3 being fixed in the base 1 by a set screw 6 and the upper die 5 being maintained with its lower end spaced a short distance from the M1121,- cent end of'die 3 by means of a sprmg? interposed between the top face of the frame and a collar 8 formed on the upper end of said die. Die 5 is prevented from movlng upwardly out of the frame by a set screw 9 engaging shoulder 10 formed by the end of a groove 11 in sald die into wh ch sa d screw 9 extends. This screw, working m this groove, also performs another function i which Wlll appear hereinafter. WELL, a citizen of the Unlted States, resid- Preferably the dies 3 and'5 are circular I Specification of Letters Patent. Patented F b. 22 1921 in cross section and to render them durable they are of a relatively large diameter butgroove 11 is so located in the upper die 5 that when said die is secured in position by screw 9, the end faces 12 of the dies will extend parallel to each other and the shoulders 14 on said faces will be vertically opposed to each other, these relative positions being permanently maintained by the screw and groove.

In operation the insulator nail is first placed through the insulator sections and its protruding, unheaded end positions horizontally on die 3 between shoulders 14, with the greater portion of its body lying above the face of die 3, due to the fact that the distance between the shoulders 14: is less than the width of the pin. A blow is then delivered with a hammer, or-other tool, upon the head formed by shoulder 8 on die 5, driving this down on die 3, whereupon a small portion of the body of the nail will be extruded by the shoulders 14., the greater portion of the nail body being received in the recesses 1.3. These extruded portions form the ears or fins 15, as illustrated in Fig. i, and preferably they are spaced a suflicient distance from the head of the nail to permit the insulator sections to be moved apart.

What is claimed is:

1. In a machine of the character described, the combination of a stationary and a movable die positioned in alinement with each other, the adjacent ends of the dies being elongated and relatively thin, a pair of integral shoulders on each of the adjacent thin ends of the dies, there being a recess in the face of each die between said shoulders,

scribed, the combination of a stationary die the distance between the shoulders on the respective dies being less than the width of the article operated upon, whereby when the dies are moved toward each other a small portion of the body of the article will be extruded and formed into relatively narrow fins on each side of the article and the major portion of the body of the article will be received in said recesses.

2. In a machine of the character deand a movable cooperating die of comparatively large cross section throughout the greater portion of their length, the adjacent end portions of the dies being tapered to form elongated and relatively thin end faces, a pair of thin shoulders on each of the adjacent end faces ofthedies, the shoulders on the respective dies'beingspaced apart a distance less than the width of the in the space between the shoulders on the dies.

CHARLES M. CALDWELL. 

